Stop for weights of multiple-needle detectors



June 28,1927. A. A. GORDON 3 3 STOP FOR WEIGHTS 0F MULTIPLE NEEDLEDETECTORS 'Filed neo. 21. 1925 l Patented June 28, 1927.

UNITED srA'rEs PATENT` oFFicE.

ALBERT A. GORDON, OF WORCESTER, MASSACHUSETTS, ASSIGNOR TO CROMPTON &KNOWLES LOOM WORKS, OF WORCESTER, MASSACHUSETTS, A CORPORATION'OFMASSACHUSETTS.

STOP FOR WEIGHTS OF MULTIPLE-NEEDLE DETECTORS.

Application filed December 21, 1925. Serial No. 76,823.

In the co-pending application there is shown a feeler of the multipleneedle type having Weights, one for each needle, the effect of which isto cause light pressure on the needles to move them through a very thinlayer of yarn. When a loom equipped with a detector of this type isrunning at a comparatively high rate of speed it is found that theweights swing abnormally about their pivots, striking the hub of thetransferrer arm immediately above the 'detector and resulting inobjectionable deforming of the weights. This excess movementof theweights carriesA them away from the needles and as they rebound from thetransferrer arm they give the needles a blow which will drive them intoVa full bobbin with resultant wearing or through a thin layer of yarnand into one of several holes formed in the barrel of the bobbin.,causing premature indication of substantial weft'exhanstion. It is alsofound that under certain conditions the upper ends of the needles areforced against the actuating lever as the same moves down wardly,scoring said lever and rendering its operation inaccurate. It is animportant ob ject of my invention to restrain excess move ment of theweights to the end that the objections mentioned may be overcome.

It is a further object of my invention to improve the weights shown inthe aforesaid application and adapt the spring supporting bracket of theaforesaid patent to cooperate with the improved weights to preventexcess movement thereof.

With these and other objects in view which will appear as thedescription proceeds, my invention resides in the combination andarrangement of parts hereinafter described and set forth in the claims.

In the accompanying drawings wherein a convenient embodiment of myinvention is shown,

Fig. 1 is an end elevation of a detector partly in section showing myinvention applied thereto,

y Fig` 2 is a perspective view of one of the weights, and

Fig. 3 is a. detail horizontal section on line 3 3 of Fig. 1.

Referring to the drawings it will be seen that I have provided adetector stand 10 which may be secured to the'loom in any approvedmanner and said stand has bolted thereto a support 11 provided with awedged rib 12 to enter a complementarily formed notch vor groove in thelower rear face of the needle carrier 13.' Said carrier has a pluralityof needles 14 mounted therein for free sliding movement each of whichhas a yarn engaging tip 15 and an indicating end 16. The ends 16cooperate with an actuator 17 which communicates the indication to theweft replenishing mechanism, not shown. In order to return the needles14 to their proper detecting position the upright portions 1S thereofare each engaged by a weight 19 pivoted for free motion on a1 stud 2Osecured h to a lug 21 preferably formed integrally with the carrier 18.A needle withdrawing member Q2 is also pivoted on the stud 20 and isprovided with an arm 23 which as shown in Fig. 3 extends behind theupright portions of all the needles 14. Said member 22 is furtherprovided with an ear 24 to be engaged by a part of the transfermechanism (not shown) by means of which the arm 9.3 may be movedforwardly at the time of transfer to withdraw the ends 15 from the pathof the incoming bobbin. i

Extending forwardly from and secured to the carrier 13 -is asheet steelbracket 25 to the forward end of which is attached a tension spring 26the rear end of which extends through the carrier 13 and support 11 andis retained by a pin 27 which bridges the opening in support 11. In thisway the carrier 13 is mounted for yielding forwardv movement against thetension of spring26. The bracket 25 has an upper shelf 28terminating atits forward end in an upbent end 29. The matter thus far described issubstantially the same as that shown in the aforesaid patent andapplication and forms no part of my present invention.

In carrying out my improvements I provide each of the weights 19 with adepending finger 30 and I further provide theY upbent end 29 with ashock absorbing pad 33r lil iii)

Llormed et suitable material, such as leather. l also providethe.withdrawing member Q2 with an erm 3-l which is connected to al-cnsion spring;` 35 the lower end ot which is fastened to the bracket95. Said spring' serves to position the :firm Q9 :ind ear 2l.

in operation the weights will normally be in the position indicated inil'iill lines in Fig. l, and :is bobbin lV advances it will engage therear ends oi" the needlesand nieve the same forwardly. lt the bobbin is'full its advancing surilece will move to the dotted line position shownin Fig. i, and the needles and weights will move to the dot and dashline position. lt will be seen that in this position lingers 30 engagethe .shock absorbing pad to prevent excess movement olf the weights. Thelatter therelire do not move to i position trom ivhieh thej,7 condescend and strike the needles torce the same against a yarn sui-fece orthrough .'elatively thin layers ot wett. vThe spr moves with the carrier1?; and serves to p=. properly sition the ivithdraivinigi` men'iher Q2with respect to the needles.

Frein the foregoing it will be I here provided n Wett detector ot tipleneedle type having weights trolled as to prevent excess movementythereo'j so that the needles are not struck to we; the yarn ot' a fullbobbin or pen rate a thin layer of weft. Furthermore, it will be seenthat the shock absorbing' pad serves the double function ot' limiting,`iforvv l movement et the needles and also the Weights and that said padmoves with the stud 2() to be operative in all positions oi the carrier13 to prevent improper movement ont the needles and Weights.

Having thus described my invention it will be apparent that changes andmodifiu cations may be mode therein by those skilled in the srt withoutdeparting` from the spirit and scope of the invention, and l do not wishto be limited to the details herein disclosed but what I claim is:

l. In :i weft detector for looms, u carrier, e plurality oi needledetectors slidnbly mounted in the carrier. a plurality o'l weights onefor each needle detector to hold said needles rearwardly in engagementwith the vorn to be detected, e stop mounted on the carrier, and afinger extending from each weight to engijage the stop when said weightsare moved forwardly by the needles, said stop preventing' excessmovement ol the weights beyond Y position correspondinp` to the foremostposition assumed b v the needle detectors.

2. n a wett detector for looms7 er carrier, e plurality7 ot needledetectors slidably mounted on the ceri-ier, :i -weightft'or each needledetector to hold the sinne yieldingly in engagement with the surface tobe de-V tected, a stop n'iounted on the carrier and having' a yieldingsurface, and a linger termed on each w ight and positioned to engage theyielding surface wh n the iii'eights nre moved beyond the position coi'-respoudini` to the toiemost position nssinned oy the needle detectors.

3. in a Wett detector for looms. a carrier, a pluralityv oi' needledetectors movable on said carrier: a weight- 'lfor each needle detectorto hold the sii-me yieldingly rin engagement with the yarn to bedetectedj a nger depending from each weight, o` support on Which seidcarrier is movably mounted, and o stop movable With the carrier in allof its positions to engage and prevent excess movement et' the Weightsbeyond the position corresponding to the ltoremost position assumed bythe needle detectors. f

4i. A Weight tor o multiple needle Wett detector, said weight havingreceive ti stud and having a. portion te engege a needle detector andhaving also a linger to engage a stop. l

In testimony WhereoiE I have hereunto ailixed my signature.

ALBEPT A. GORDON.

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